My client (a Corporation) hired a PEO for 2022.  What I know is that a PEO hires the company's employees and remit taxes and files returns with the IRS.  I believe the payroll tax returns are filed under the EIN of the PEO. 

The IRS doesn't have a record of the payroll taxes for 2022 for my client.  I told the IRS rep about the PEO arrangement, and she didn't know about them.  I didn't know what to do so I ended the call.  Does the PEO need to provide any "proof" of filing?